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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments 74FCT163H245CPACT

Name: 74FCT163H245CPACT
Brand: Texas Instruments
SKU: 74FCT163H245CPACT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74FCT163H245CPACT

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: -

Datasheet:: 74FCT163H245CPACT.pdf

Description:: BUS TRANSCEIVER, FCT SERIES

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Product details

Overview

74FCT163H245CPACT from Texas Instruments is a 16-bit non-inverting bus transceiver with bus-hold inputs, designed for bidirectional synchronous data transfer between two 3.3-V buses. It features 4.1 ns propagation delay (t_PLH/t_PHL), 24 mA balanced output drive, and operates across V_CC = 2.7 V to 3.6 V at –40°C to +85°C. It enables live insertion in backplane or hot-swap applications via power-off disable outputs.

For engineers reviewing the 74FCT163H245CPACT datasheet, 74FCT163H245CPACT pinout, 74FCT163H245CPACT application, or 74FCT163H245CPACT equivalent, key selection criteria include bus-hold input retention, 5-V tolerant I/O compatibility, low ground bounce (<250 ps skew), TSSOP-48 package footprint, and industrial temperature operation without external pull resistors.

Technical Context

The 74FCT163H245CPACT implements dual 8-bit bidirectional data paths controlled by independent DIR and OE signals per port pair, supporting simultaneous A→B and B→A transfers when directionally enabled. Its bus-hold circuitry actively maintains last-valid logic state on all data inputs during high-impedance conditions, eliminating floating inputs without external biasing.

It uses FCT-C logic family architecture with edge-rate control to limit switching noise, integrated current-limiting output drivers (±24 mA), and power-off disable that forces outputs into high-Z when V_CC = 0 V - enabling safe live insertion into powered systems. All I/O pins tolerate 5.5 V, allowing interoperability with legacy 5-V CMOS buses while operating from a 3.3-V supply.

Key Specifications

Parameter	Value and Actual Design Meaning
Propagation Delay	4.1 ns max (t_PLH/t_PHL at V_CC = 3.0–3.6 V) - ensures timing compliance in high-speed 3.3-V bus interfaces up to ~200 MHz data rates
Supply Voltage Range	2.7 V to 3.6 V - compatible with standard 3.3-V rail with ±0.3 V tolerance, not usable at 5 V core supply
Output Drive Strength	±24 mA balanced - drives stub-loaded transmission lines directly without series termination resistors
Input Hysteresis	100 mV - improves noise immunity on slow-rising or noisy bus signals
Bus-Hold Sustain Current	±50 µA at V_I = 0.8 V / 2.0 V - maintains valid logic level with no external components under open-bus conditions
Power-Off Disable Leakage	±100 µA at V_CC = 0 V - prevents back-driving of powered buses during hot-plug events
Operating Temperature	–40°C to +85°C - qualified for industrial-grade embedded control and communications equipment

Pinout & Package

74FCT163H245CPACT is housed in a 48-pin Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, with 0.5 mm pitch, 12.6 mm × 6.2 mm body size, and 1.2 mm max height. Pin 1 marked via notch or dot; thermal pad not present.

Pin/Terminal	Circuit Role	Design Meaning
1DIR, 2DIR	Direction Control Inputs (per port)	Active-HIGH logic selects data flow direction: DIR = HIGH enables A→B; DIR = LOW enables B→A
1OE, 2OE	Output Enable Inputs (active LOW)	When HIGH, places corresponding port outputs in high-impedance state; supports independent port isolation
1A1–1A8, 2A1–2A8	Port A Data Terminals	Bi-directional I/Os with bus-hold; function as inputs or 3-state outputs depending on DIR/OE state
1B1–1B8, 2B1–2B8	Port B Data Terminals	Bi-directional I/Os with bus-hold; mirror A-side behavior with independent DIR/OE control
V_CC (Pins 24, 25, 47, 48)	Power Supply	Four dedicated V_CC pins reduce supply inductance and improve noise margin across wide bus
GND (Pins 12, 13, 26, 27, 39, 40)	Ground	Six GND pins provide low-inductance return path for 16 drivers and internal logic

Key Features

Feature	Design Value
Bus-Hold Inputs	Retains last valid logic state on all 32 data pins without external pull-up/down resistors - reduces BOM count and layout area
5-V Tolerant I/O	Accepts 0–5.5 V input levels and drives 5-V buses while powered from 3.3 V - enables mixed-voltage system interfacing
Edge-Rate Controlled Outputs	Controlled slew rate minimizes EMI and ground bounce - eliminates need for external RC damping networks
Power-Off High-Z Outputs	Outputs enter high-impedance state when V_CC = 0 V - prevents back-powering or contention during live insertion
Low Ground Bounce	Typical output skew <250 ps and Volp exceeding MIL-STD-883D - ensures signal integrity in dense PCB layouts

Applications

Industrial Backplane Interface	Hot-Swappable Module Communication
Use Scenario: Bidirectional data exchange between CPU and peripheral modules across a 3.3-V backplane with shared address/data bus. IC Role / Device Role / Timing Role: Bus transceiver providing direction-controlled, isolated data coupling between master and slave slots; handles DIR/OE handshaking with system controller. Use Value: Bus-hold prevents floating states during module removal/insertion; 4.1 ns delay supports 100+ MHz bus clocking without added wait states.	Use Scenario: Real-time reconfiguration of FPGA-based I/O cards in programmable logic controllers (PLCs) with powered backplanes. IC Role / Device Role / Timing Role: Isolates hot-swapped card's local bus from main system bus; power-off disable prevents bus contention during insertion/removal. Use Value: ±100 µA IOFF leakage ensures no current injection into powered system; TSSOP-48 footprint fits compact modular carrier designs.
3.3-V/5-V Level Translation	High-Density Memory Interfacing
Use Scenario: Interfacing a 3.3-V microcontroller to legacy 5-V SRAM or flash memory in industrial HMIs. IC Role / Device Role / Timing Role: Translates logic levels bidirectionally while preserving timing integrity; DIR controls read/write direction, OE enables/disables bus access. Use Value: 5-V tolerant inputs accept 5-V memory outputs directly; 24 mA drive sustains signal integrity over 10 cm trace lengths without termination.	Use Scenario: Expanding data bus width between SoC and DDR SDRAM or QSPI flash in space-constrained edge devices. IC Role / Device Role / Timing Role: Buffers and isolates parallel data lanes between processor and memory subsystem; reduces capacitive loading on critical timing paths. Use Value: 4.5 pF typical CIN minimizes driver loading; balanced ±24 mA outputs drive multiple memory inputs with <250 ps skew for setup/hold compliance.

Industrial Backplane Interface

Hot-Swappable Module Communication

Use Scenario: Bidirectional data exchange between CPU and peripheral modules across a 3.3-V backplane with shared address/data bus.

IC Role / Device Role / Timing Role: Bus transceiver providing direction-controlled, isolated data coupling between master and slave slots; handles DIR/OE handshaking with system controller.

Use Value: Bus-hold prevents floating states during module removal/insertion; 4.1 ns delay supports 100+ MHz bus clocking without added wait states.

Use Scenario: Real-time reconfiguration of FPGA-based I/O cards in programmable logic controllers (PLCs) with powered backplanes.

IC Role / Device Role / Timing Role: Isolates hot-swapped card's local bus from main system bus; power-off disable prevents bus contention during insertion/removal.

Use Value: ±100 µA IOFF leakage ensures no current injection into powered system; TSSOP-48 footprint fits compact modular carrier designs.

3.3-V/5-V Level Translation

High-Density Memory Interfacing

Use Scenario: Interfacing a 3.3-V microcontroller to legacy 5-V SRAM or flash memory in industrial HMIs.

IC Role / Device Role / Timing Role: Translates logic levels bidirectionally while preserving timing integrity; DIR controls read/write direction, OE enables/disables bus access.

Use Value: 5-V tolerant inputs accept 5-V memory outputs directly; 24 mA drive sustains signal integrity over 10 cm trace lengths without termination.

Use Scenario: Expanding data bus width between SoC and DDR SDRAM or QSPI flash in space-constrained edge devices.

IC Role / Device Role / Timing Role: Buffers and isolates parallel data lanes between processor and memory subsystem; reduces capacitive loading on critical timing paths.

Use Value: 4.5 pF typical CIN minimizes driver loading; balanced ±24 mA outputs drive multiple memory inputs with <250 ps skew for setup/hold compliance.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit bus transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC16245ADGGR	3.3-V only I/O (not 5-V tolerant); lower drive (±24 mA same, but no bus-hold); 4.2 ns typical t_PD	Requires external pull resistors; unsuitable for hot-swap due to no power-off disable	Select when cost sensitivity outweighs live-insertion requirement and 5-V bus compatibility is unnecessary
74FCT16245CPAG	No bus-hold; SSOP-48 package; identical speed (4.1 ns) and 5-V tolerance; lacks power-off disable	Needs external pull-ups; cannot be used in hot-swap systems without additional isolation circuitry	Choose for legacy SSOP footprint compatibility where bus-hold and live insertion are not required

Compared with SN74LVC16245ADGGR and 74FCT16245CPAG, the 74FCT163H245CPACT uniquely combines bus-hold, power-off disable, and 5-V tolerance in a single TSSOP-48 device - making it the only option among the three qualified for industrial hot-swap and mixed-voltage backplane designs without design compromises.

Availability

74FCT163H245CPACT is available at Aetrix Electronics and suitable for industrial backplane interfaces, hot-swappable module communication, 3.3-V/5-V level translation, and high-density memory interfacing requiring stable component supply and long-term lifecycle support.

Supply support for 74FCT163H245CPACT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company delivering analog and embedded processing solutions, with leadership in logic, interface, and power management ICs since 1930.

The 74FCT163H245CPACT belongs to TI's FCT-C advanced CMOS logic family, engineered specifically for high-speed, low-noise, mixed-voltage bidirectional bus interfacing in industrial and telecom infrastructure equipment.

FAQ

What is the maximum data rate supported by the 74FCT163H245CPACT?

The 74FCT163H245CPACT supports reliable operation up to approximately 200 Mbps per data line, based on its 4.1 ns maximum propagation delay and <250 ps output skew. This enables use in high-speed parallel interfaces such as 32-bit local buses running at 50 MHz clock rates with adequate setup/hold margins. Actual achievable data rate depends on PCB layout, load capacitance, and signal integrity design practices.

Does the 74FCT163H245CPACT require external pull-up or pull-down resistors?

No, the 74FCT163H245CPACT does not require external pull-up or pull-down resistors because it integrates bus-hold circuitry on all 32 data input pins (1A1–1A8, 1B1–1B8, 2A1–2A8, 2B1–2B8). This feature actively retains the last valid logic state during high-impedance conditions, eliminating floating inputs and reducing BOM count and board space.

Can the 74FCT163H245CPACT be used in hot-swap applications?

Yes, the 74FCT163H245CPACT is explicitly designed for hot-swap applications due to its power-off disable functionality: when V_CC = 0 V, outputs enter high-impedance state with only ±100 µA leakage current, preventing back-driving or contention on live backplanes. This capability, combined with 5-V tolerant I/O, makes it suitable for modular PLCs and telecom line cards.

What is the difference between 74FCT163H245CPACT and CY74FCT163H245CPACT?

The 74FCT163H245CPACT and CY74FCT163H245CPACT are functionally identical devices. "CY" prefix denotes Cypress Semiconductor's original part number before TI's acquisition of Cypress's timing and logic portfolio in 2020. TI now manufactures and supports both part numbers under the same datasheet (SCCS051), with identical electrical specs, pinout, and packaging - the prefix reflects legacy branding, not functional distinction.

Is the 74FCT163H245CPACT RoHS compliant and lead-free?

Yes, the 74FCT163H245CPACT is RoHS compliant and lead-free. As documented in TI's packaging addendum, the TSSOP-48 (DGG) package carries Pb-Free (RoHS) finish, meeting EU Directive 2011/65/EU requirements. The device is rated MSL-1 (unlimited floor life) and qualified for standard lead-free reflow profiles with peak temperature up to 260°C.

74FCT163H245CPACT Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Logic Type:: -

Number of Elements:: -

Number of Bits per Element:: -

Input Type:: -

Output Type:: -

Current - Output High, Low:: -

Voltage - Supply:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

74FCT163H245CPACT FAQ

1.How can I place an order for 74FCT163H245CPACT through Aetrix?

Please submit a Request for Quotation (RFQ) for 74FCT163H245CPACT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 74FCT163H245CPACT reliable?

The price and inventory of 74FCT163H245CPACT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT163H245CPACT is usually 5 days.

3.What payment methods are accepted for 74FCT163H245CPACT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74FCT163H245CPACT transactions.

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4.How is shipping managed for 74FCT163H245CPACT?

74FCT163H245CPACT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74FCT163H245CPACT order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 74FCT163H245CPACT?

For technical support, including 74FCT163H245CPACT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT163H245CPACT requirements.

6.How does Aetrix verify that 74FCT163H245CPACT is sourced from the original manufacturer or authorized distributors?

All 74FCT163H245CPACT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74FCT163H245CPACT meets industry standards.

7.What is the process for return or replacement of 74FCT163H245CPACT?

All 74FCT163H245CPACT units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT163H245CPACT, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 74FCT163H245CPACT part is unused and in its original packaging.

Return procedure for 74FCT163H245CPACT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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